Sighting instrument



FIG. 1 is a rear perspective view of a sighting instrument, showing mynew design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a rear perspective view of another embodiment;

FIG. 9 is a rear elevational view thereof;

FIG 10 is a front elevational view thereof;

FIG. 11 is a top plan view thereof;

FIG. 12 is a left side elevational view thereof;

FIG. 13 is a bottom plan view thereof; and

FIG. 14 is a right side elevational view thereof.

The ornamental design for a sighting instrument, as shown.